/// <reference types="node" />
import { BN } from 'ethereumjs-util';
import { EthereumActionContract, EthereumAddress, EthereumPrivateKey, EthereumPublicKey } from '../models';
/** Attempts to transform a value to a standard Buffer class */
export declare function toEthBuffer(data: string | BN | Buffer | number): Buffer;
export declare function matchKnownAbiTypes(contract: EthereumActionContract): {
    erc20: boolean;
};
/** Compare two '0x' pre-fixed eth values (e.g. address or private key)
 * adds 0x if missing, also aligns case (to lowercase) */
export declare function isSameEthHexValue(value1: EthereumAddress | EthereumPrivateKey, value2: EthereumAddress | EthereumPrivateKey): boolean;
/** Compare two '0x' or '0x40' pre-fixed eth public keys (djusts for lowercase too) */
export declare function isSameEthPublicKey(value1: EthereumPublicKey, value2: EthereumPublicKey): boolean;
type GasOptions = {
    gasPrice?: string;
    gasLimit?: string;
    nonce?: string;
};
/** Returns an object with gasPrice, gasLimit, nonce - but excludes any of these if empty */
export declare function removeEmptyValuesFromGasOptions(gasPrice?: string, gasLimit?: string, nonce?: string): GasOptions;
/** use BN math functions to increase value by percentage */
export declare function increaseBNbyPercentage(baseValue: BN, percentageIncrease: number): BN;
/** Check if the given value is a string or instance of string */
export declare function isAString(value: any): boolean;
/** Checks if string is a valid hex string - optional '0x' prefix - Note: ethers.isHexString requires '0x' prefix */
export declare function isHexString(value: any): Boolean;
/**
 * Converts string into UInt8Array
 */
export declare function convertStringToUInt8Array(dataString: string): Uint8Array;
export {};